I think a lot of us 'Religious Right' Republicans (those of us who are) probably worry much more about politics than what Jesus would if he were alive today. Whether or not the government is run by Democrats or Republicans does not affect in the least the simple duties that our Christian religion places in front of us each and every day.
We can still love our neighbor, share what we have with the poor, preach the Gospel to all creation, and walk as Jesus walked in every area of our life, even if we don't happen to control Congress in a certain year.
The power of a government over its people is inherently limited. The power of Christ working through His Church (that's you and me!) is without limit! If you want to change a nation... start with just one person. God has given you the responsibility to minister His Truth to your sphere of influence, whether it be your family, at work, at school, or in recreation.
Don't worry about what you can't change (there will always be Democrats and abortion-rights activists)... instead, follow the example of Christ and be His Light to your community. Let Him use you to bring Eternal Salvation to those around you! Nothing could be more important than that.